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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 04-27-2015, 11:48 PM
AristoPei AristoPei is offline
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Wheel Fitment Question

When it comes to fitment my mind just can't figure it out. The ET's, Offsets, and tire sizes... It's just one of those things my brain will not process so i'll let the experts school me...

Recently I found a set of wheels that I am interested in. 19x9.5 ET: 15 or 40 <~ Fronts and 19x10.5 ET:15 Rears. How hard would it be to makes these fit? What tire size should I go with? Thank you in advance!!!

Here's a picture of one of my daily just for kicks: 2001 Volkswagen GTI 12V VR6 Bone Stock other then FK High Sport Coils, CCW LM20's in 17x8.5 and 17x10, and Magnaflow Cat Back Exhaust.

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  #2  
Old 04-28-2015, 07:44 AM
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johnstern johnstern is offline
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The answer to your question is extremely varied. Plus you are on an E39 sub forum while your info states you have an E38. Wheels for these two cars have a different center bore size-E39=74.1mm; E38=72mm (AFAIK). A machine shop can, of course, bore a smaller center bore size to fit an E39.

All I can suggest is a call to The Tire Rack or another wheel/tire seller. Yhey have real wheel/tire experts there.
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Old 04-28-2015, 08:39 AM
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IgotBMW IgotBMW is offline
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Did I miss the question? I don't see it on your post.
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Old 04-29-2015, 09:31 PM
AristoPei AristoPei is offline
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My bad. I use to own a 2001 740I. I'll have to change that! The question is for a 2002 BMW 530I Sport! Thanks!
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Old 04-29-2015, 11:23 PM
AristoPei AristoPei is offline
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Fixed!

@Johnstern When I ask companies like that these type of questions they always hit me with the political answer: "It is unsafe to run a different wheel and tire combo that is different from factory specs" That's why i'm asking the forum! I was hoping to maybe catch the attention of someone who had this or a bit more of an aggressive stance to theirs. I can't just eye it like some of you can.
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Old 04-30-2015, 05:44 AM
edjack edjack is online now
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One way is to measure the offset of both wheels. S/b pretty close for proper geometry. Then, the rule of thumb for tires is that the wheel width s/b no less than 80-90% of the tire cross-section; greater for lower profile tires.

Thus, for a 255 tire, the rim width should be no less than 8 in, and preferably, 9 in.

Then, if these wheels were not designed for an E39, the center bores will have to be increased to to fit the hubs.

Finally, will the tires rub? You'll have to mount them to see.
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Last edited by edjack; 04-30-2015 at 05:47 AM.
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Old 04-30-2015, 06:44 AM
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DennisCooper! DennisCooper! is offline
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Hi AristoPei,

This question and how to find the answers has been posted up multiple thousands of times across all the BMW forums ! You'll need to learn how to jedi master the search button

In short,

For the E39 - front wheels are usually 8.5x19 with an offset range of around ET12-18. Tyre sizing is 245/35/19 but you can get away with 235/35/19. Depending on the offset of the wheel, if you go for a more aggressive choice (lower ET figure) then you 'might' get more chance of scraping/rubbing when the car's body moves up/down when going over road undulations. You can look at different tyres as some have more of a 'rounder' shoulder construction and some are more of a square shoulder construction. This will affect you more if the car is lowered. Also, the higher the offset, the 'closer' the back of the wheel will be to shock absorbers and calipers etc, so be wary of that.

Rear wheels - these are usually 9.5x19 with an offset range of between ET15-30. Tyre sizing is 275/30/19 but you can get away with 265/30/19. Same as above, the more aggressive offset, the more chance of some scrapes/rubs and tyre choice and how much you lower by will be factors.

If you spend a good bit of time learning about tyre sizes, wheel sizes, offsets, lowering etc, you can get some much more aggressive setups which can look absolutely fantastic. It's possible to run 10 inch wide front wheels and 11 to 11.5 inch rears without too much difficulty and you can go 12's with more work etc if you wish. It all depends on the look and aesthetic you wish to go for. You can also use spacers to get the last bit of fitment right if you can't find the wheels in 'exactly' the required offsets.

The E39 has a specific 74.1mm centre bore size. Lots of questions (thousands of times!) are when people will ask if the much more common on other BMW's 72.56 mm CB wheels will fit on an E39 as they've seen a set. You can, but it's extra expense by either having the centre bore machined out to 74.1 mm or by using hubcentric adapters or spacers. Many aftermarket high quality wheels will have a larger centre bore - up to 82mm sometimes, so they'll need a hubcrentric ring in order to bring the CB to 74.1mm.

Lastly, many many companies will say the same as you got above. The reason is that the 'oem' configurations are all they know of and about due to it being from the 'oem' manufacturer being asked about. They cover themselves by telling you that so that if you 'really wanted' them to fit/do work on your car away from manufacturers specs and something went wrong, you wouldn't hold them liable. If you look at the reputable, high quality aftermarket specialists who've tested and certified products which are bigger/different to oem specs, then that's absolutely fine.

I hope you've found some excellent looking wheels!

Cheers, Dennis!
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Old 04-30-2015, 11:34 AM
edjack edjack is online now
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